61378889 has 8 divisors (see below), whose sum is σ = 72109632. Its totient is φ = 51506640.

The previous prime is 61378879. The next prime is 61378907. The reversal of 61378889 is 98887316.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61378889 - 2¹⁶ = 61313353 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61378829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214469 + ... + 214754.

It is an arithmetic number, because the mean of its divisors is an integer number (9013704).

Almost surely, 2^61378889 is an apocalyptic number.

It is an amenable number.

61378889 is a deficient number, since it is larger than the sum of its proper divisors (10730743).

61378889 is a wasteful number, since it uses less digits than its factorization.

61378889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429247.

The product of its digits is 580608, while the sum is 50.

The square root of 61378889 is about 7834.4680100183. The cubic root of 61378889 is about 394.4630615090.

The spelling of 61378889 in words is "sixty-one million, three hundred seventy-eight thousand, eight hundred eighty-nine".